#include<stdio.h>
#include<assert.h>
/*size_t my_strlen(const char* p) {
    assert( p );
	char* p1 =  p;
	while (*p1 != '\0') p1++;
	return p1 - p;
}
int main() {
	char arr[] = "abcdef";
	unsigned int len = my_strlen(arr);
	printf("%u\n", len);
	return 0;
}*/